Chemistry Nexus

by WebElements: the periodic table on the web

Thispanish periodic table stamp.previews stamp commemorates the death of Mendeleev (February 1907), one of the lead figures responsible for the periodic table. Absolutely excellent choice of colours if I might say so!

The stamp was sent to me by Prof Gabriel Pinto (Departamento de Ingeniería Química Industrial, ETSI Industriales, UPM, Madrid, Spain) and I quote from his web page: “This stamp was launched on february 2, 2007, by Correos (Spanish Post Office).

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February 2nd, 2007

Posted In: Chemistry

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“On the Arc Spectrum of Scandium”, Published by William Crookes in the Proceedings of the Royal Society of London, Series A1

This article was published in 1918 by William Crookes and is made available by The Royal Society because of its great historical significance. It makes interesting reading. It shows photographs of the experimental data.


1. Crookes, W. “On the Arc Spectrum of Scandium“, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1919, 95, 438-440. 
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June 4th, 1919

Posted In: Analytical chemistry, Chemistry

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